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the middle of the three fascicles that form the lateral ligament of the ankle joint, reinforcing the lateral side of the ankle joint and resisting excessive inversion of the foot; the remaining two ligaments of the lateral ligaments are the anterior and posterior talofibular ligaments.
Synonym(s): ligamentum calcaneofibulare [TA]
calcaneofibular ligamentThe narrow rounded middle fascicle of the 3-part lateral ankle ligament, which counters excess foot inversion. It courses from the apex of the fibular malleolus inferoposteriorly to a tubercle on the lateral calcaneus. Sprains cause 85% of ankle injuries, of which 85% are inversion injuries involving the lateral ligaments, primarily the anterior talofibular ligament, closely followed by the calcaneofibular ligament.
RICE—rest, ice, compression, and elevation—are the mainstays of early management; surgery for grade-III sprains, especially for young professional athletes.
calcaneofibular ligamentAbbreviation: CFL
An extracapsular ligament of the lateral ankle joint. The calcaneofibular ligament originates from the inferior apex of the lateral malleolus and courses at approximately a 133° angle to attach to the calcaneus. It is the primary restraint against talar inversion when the ankle is in its neutral position.
See also: ligament